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Old 12-03-2012, 07:27 AM   #13
Scooby Specialist
Member#: 299286
Join Date: Oct 2011
Chapter/Region: NESIC
Location: Upstate NY
2017 Legacy Limited


Originally Posted by pkL View Post
I've been doing my oil changes at a 4k OCI. Would that be too short of an OCI and just excessive?
It is excessive. The manufacturer interval of 7,500 is fine unless you are driving in severe conditions. Otherwise you are just wasting your money changing the oil so often.

I am going with a longer interval, but plan on doing a used oil analysis to see how the Signature series performs over 9,000 miles or so that I drive annually.

This is compounded by the fact that 90% of people who do the short oil change intervals trade the car in after 4 years. Overkill, extra expense, and even if there were some marginal reduction in internal engine wear, you won't benefit at all from it.

There is one exception (IMHO) if you plan on keeping the car a long time, do one early oil change after 1,000 miles. Then jump on the manufacturer interval.
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